Max Friquent Number

using System;
using System.Linq;

namespace Most_Friquent_Number
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

            int counter = 1;
            int countMax = -1;
            int numMax = -1;

            for (int i = 0; i < numbers.Length; i++)
            {
                if (numbers[i] != numMax)
                {
                    for (int j = i + 1; j < numbers.Length; j++)
                    {
                        if (numbers[i] == numbers[j])
                        {
                            counter++;
                            if (counter > countMax)
                            {
                                countMax = counter;
                                numMax = numbers[i];
                            }
                        }
                    }
                }
                counter = 1;
            }

            Console.WriteLine(numMax);
        }
    }
}